what is up with American stores manning the shops at bare minimum

Before covid, they were just starving support staff slowly. A few automated checkouts, less hands on the floor than in the 90's and the 00's. You'd often have someone re-folding, re-organizing, and restocking at all times. in the 10's it became more like staff during busy periods only.

When covid hit, the stores went to absolute operation bare minimum or even less. They figured out that they could literally put no one on the floor, stock and refill at night and profits boom. We're seeing that across almost all industries. It's like someone said, hey, have you tried just not providing any service at all AND raising prices. (e.g. health insurance) We should all be in the streets for blood, but we're not. The idiots are bringing back the right wing, expecting them to care at all about their plight.

We are in a rather self-destructive area of capitalism. The top is expanding as fast and hard as they can. They are bleeding the lower and middle classes harder than they ever have before. I give it a year top before everything crashes and inflation puts us about on par with the lesser economies.